feat(tasks): adopt canonical task statuses

migrations/versions/0001_initial_schema.py

@@ -29,7 +29,7 @@ def upgrade() -> None:
         "active", "blocked", "completed", "archived", name="workstreamstatus", create_type=True
     )
     task_status = postgresql.ENUM(
-        "todo", "in_progress", "blocked", "done", "cancelled", name="taskstatus", create_type=True
+        "wait", "todo", "progress", "done", "cancel", name="taskstatus", create_type=True
     )
     task_priority = postgresql.ENUM(
         "low", "medium", "high", "critical", name="taskpriority", create_type=True

migrations/versions/a4v5w6x7y8z9_task_status_canon.py

@@ -0,0 +1,57 @@
+"""adapt task status enum to InfoTechCanon task lifecycle
+
+Revision ID: a4v5w6x7y8z9
+Revises: z3u4v5w6x7y8
+Create Date: 2026-05-25
+
+"""
+from alembic import op
+
+revision = "a4v5w6x7y8z9"
+down_revision = "z3u4v5w6x7y8"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.execute("ALTER TABLE tasks ALTER COLUMN status DROP DEFAULT")
+    op.execute("ALTER TYPE taskstatus RENAME TO taskstatus_old")
+    op.execute("CREATE TYPE taskstatus AS ENUM ('wait', 'todo', 'progress', 'done', 'cancel')")
+    op.execute(
+        """
+        ALTER TABLE tasks
+        ALTER COLUMN status TYPE taskstatus
+        USING (
+            CASE status::text
+                WHEN 'blocked' THEN 'wait'
+                WHEN 'in_progress' THEN 'progress'
+                WHEN 'cancelled' THEN 'cancel'
+                ELSE status::text
+            END
+        )::taskstatus
+        """
+    )
+    op.execute("ALTER TABLE tasks ALTER COLUMN status SET DEFAULT 'todo'")
+    op.execute("DROP TYPE taskstatus_old")
+
+
+def downgrade() -> None:
+    op.execute("ALTER TABLE tasks ALTER COLUMN status DROP DEFAULT")
+    op.execute("ALTER TYPE taskstatus RENAME TO taskstatus_new")
+    op.execute("CREATE TYPE taskstatus AS ENUM ('todo', 'in_progress', 'blocked', 'done', 'cancelled')")
+    op.execute(
+        """
+        ALTER TABLE tasks
+        ALTER COLUMN status TYPE taskstatus
+        USING (
+            CASE status::text
+                WHEN 'wait' THEN 'blocked'
+                WHEN 'progress' THEN 'in_progress'
+                WHEN 'cancel' THEN 'cancelled'
+                ELSE status::text
+            END
+        )::taskstatus
+        """
+    )
+    op.execute("ALTER TABLE tasks ALTER COLUMN status SET DEFAULT 'todo'")
+    op.execute("DROP TYPE taskstatus_new")